Eric Zassenhaus/ KPCC

Riders in the 4th CicLAvia event on 7th and Main Streets in downtown Los Angeles, April 15, 2012.

Carmageddon 2 isn't the only road closure affecting Angelenos this weekend. There's also a triathlon in Venice.

And there's little relief in sight because next Sunday Downtown Los Angeles will shut several streets for Ciclavia, the semi-annual gathering of pedestrians and cyclists

That same day, President Obama is scheduled to appear at a concert and a fundraiser at the Nokia Theater.

It's a recipe for a traffic nightmare, but if you think you're worried, you've got nothing on Aram Sahakian, he oversees special traffic operations for L.A.'s Department of Transportation.

When a street closes, it is his job to make sure it goes as smoothly as possible.